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The 300kVA oil cooled distribution transformer is a core equipment for small and medium-capacity single-phase power distribution. Adopting a fully sealed oil-cooled heat dissipation and integrated insulation design, oil cooled distribution transformer combines high cooling efficiency, temperature stability, and robust distribution-grade reliability. Oil cooled distribution transformer is perfectly suited for various single-phase scenarios, including urban residential communities, rural centralized living areas, small industrial workshops, and commercial complexes. It operates stably in standard climates (-25℃ to 40℃) to seamlessly meet single-phase power transmission needs.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Structure: Fully Sealed Oil-Cooled + Integrated Insulation.
• Warranty: 3-Year Standard Warranty.
Product Features
A dedicated high-efficiency oil cooling system provides a large, uniform heat dissipation area. Oil cooled distribution transformer rapidly exports operational heat to precisely control temperature rise during continuous distribution.
Tier 2 efficiency paired with pure copper windings minimizes running losses. The fully sealed oil-cooled insulation prevents oil degradation, yielding a 25+ year design lifespan.
Oil cooled distribution transformer equipped with complete protection devices (Buchholz relay, pressure valve, fault alarms). The anti-corrosion tank safely adapts to complex outdoor or semi-outdoor environments.
Its compact volume easily fits various distribution layouts without extra infrastructure. A 1.2x overload capacity effortlessly handles temporary peak loads.
The fully sealed structure drastically reduces maintenance frequency. Mature core components ensure a low failure rate, meeting low O&M cost requirements.
Specifically optimized for single-phase distribution networks. Convenient wiring precisely matches single-phase equipment demands, eliminating energy waste from 3-phase conversions.
Key Specifications (300kVA Single-Phase)
| Parameter | Typical Value | Description |
| Rated Capacity | 300kVA | Maximum apparent power for long-term safety, meeting single-phase distribution load needs. |
| Rated Voltage | 10kV / 0.23kV | Customizable 6kV, 11kV high voltage to adapt to different distribution grid standards. |
| Vector Group | Ii0 | Standard single-phase connection; simple wiring perfectly adapted to single-phase systems. |
| Impedance | 4.5%~6.5% | Standard 5%~6% limits short-circuit currents, protecting downstream equipment. |
| No-Load Loss | ≤ 0.55kW | Complies with Tier 2 standards; low idle energy consumption saves operational costs. |
| Load Loss (75℃) | ≤ 3.0kW | Copper windings and efficient oil cooling elevate energy conversion efficiency. |
| Winding Temp. Rise | ≤ 65K (AN, Class A) | Synergistic temperature control prevents insulation aging caused by excessive heat. |
| Noise Level | ≤ 52~57dB(A) | Low-noise core and shock-absorbing design lower noise by 5dB, reducing environmental pollution. |
| Cooling Method | ONAN + High Efficiency | Highly efficient oil-cooling system tailored for continuous power distribution operations. |
Detailed Description
The oil cooled distribution transformer is a core power transmission and distribution device widely applied in urban grids, industrial parks and rural power supply systems. It relies on insulating oil to realize efficient heat dissipation and electrical insulation, effectively stabilizing operating temperature and ensuring safe and continuous power conversion. Compared with dry-type transformers, this oil cooled distribution transformer features stronger environmental adaptability, lower operating noise and longer service life, making it suitable for long-term outdoor and heavy-load operation.
As a mainstream specification in the power industry, the 300kVA oil cooled distribution transformer is favored for its moderate capacity and high cost performance. It perfectly matches the power demand of small and medium-sized factories, residential communities and commercial buildings, realizing stable voltage step-up and step-down for daily power supply. The 300kVA oil cooled distribution transformer adopts optimized internal winding structure and high-quality insulating oil, which greatly reduces energy consumption during operation, improves power transmission efficiency, and requires minimal daily maintenance, bringing reliable and economical power guarantee for various distribution scenarios.
Standard Ordering Process
Standard S13 Series Technical Reference
| Capacity (kVA) | Impedance (%) | No-Load Loss (W) | Load Loss (W) | No-Load Current (%) | Oil Weight (kg) | Total Weight (kg) | Dimensions W×D×H (mm) | Gauge (mm) |
| 30 | 4.0 | 80 | 630 / 600 | 1.2 | 100 | 340 | 790×580×910 | 400 |
| 50 | 4.0 | 100 | 910 / 870 | 1.2 | 115 | 410 | 830×600×970 | 400 |
| 63 | 4.0 | 110 | 1090 / 1040 | 1.0 | 120 | 440 | 850×630×1000 | 400 |
| 80 | 4.0 | 130 | 1310 / 1250 | 1.0 | 135 | 470 | 900×650×1000 | 400 |
| 100 | 4.0 | 150 | 1560 / 1500 | 0.8 | 150 | 500 | 950×700×1000 | 400 |
| 125 | 4.0 | 170 | 1890 / 1800 | 0.8 | 175 | 600 | 1100×800×1000 | 550 |
| 160 | 4.0 | 200 | 2310 / 2200 | 0.7 | 200 | 700 | 1200×900×1050 | 550 |
| 200 | 4.0 | 240 | 2730 / 2600 | 0.7 | 215 | 750 | 1300×1000×1050 | 550 |
| 250 | 4.0 | 290 | 3200 / 3050 | 0.7 | 240 | 900 | 1400×1050×1100 | 550 |
| 315 | 4.0 | 340 | 3830 / 3650 | 0.6 | 275 | 1050 | 1500×1100×1150 | 660 |
| 400 | 4.0 | 410 | 4520 / 4300 | 0.6 | 310 | 1300 | 1550×1150×1150 | 660 |
| 500 | 4.0 | 480 | 5410 / 5150 | 0.6 | 360 | 1500 | 1650×1230×1200 | 660 |
| 630 | 4.5 | 570 | 6200 | 0.6 | 420 | 1700 | 1600×1250×1250 | 820 |
| 800 | 4.5 | 700 | 7500 | 0.5 | 520 | 2100 | 2100×1300×1650 | 820 |
| 1000 | 4.5 | 830 | 10300 | 0.5 | 620 | 2400 | 2150×1350×1700 | 820 |
| 1250 | 4.5 | 970 | 12000 | 0.5 | 680 | 2700 | 2200×1400×1900 | 820 |
| 1600 | 4.5 | 1170 | 14500 | 0.5 | 880 | 3400 | 2300×1450×1900 | 820 |
| 2000 | 5.0 | 1360 | 18300 | 0.4 | 1050 | 4400 | 2100×2200×2100 | 820 |
| 2500 | 5.0 | 1600 | 21200 | 0.4 | 1260 | 5000 | 2150×2300×2200 | 820 |
* The table above shows standard three-phase S13 series parameters, provided as a general manufacturing reference for the S13 technology platform.
FAQ
Our oil cooled distribution transformer uses insulating oil to cool core and windings. The oil absorbs operating heat, circulates to radiators for heat dissipation, and acts as dielectric insulation, letting oil cooled distribution transformer run stably under continuous distribution load.
Our oil cooled distribution transformer suits urban grids, industrial parks and rural power supply. As a professional manufacturer, we customize oil cooled distribution transformer with various kVA grades to match commercial, residential and renewable power distribution projects globally.
Every oil cooled distribution transformer from our factory strictly passes IEC, ANSI and ISO tests. We adopt high-purity copper coils and anti-corrosion tanks, ensuring each oil cooled distribution transformer meets global power distribution safety and efficiency specifications.
With regular oil inspection and routine maintenance, our oil cooled distribution transformer can serve 25–35 years. Our optimized cooling structure reduces insulation aging, greatly extending the reliable operation cycle of each oil cooled distribution transformer for power distribution networks.
As a direct manufacturer, we support full OEM & ODM for oil cooled distribution transformer. We adjust voltage, capacity and cooling modes according to project demands, delivering tailored oil cooled distribution transformer to satisfy different regional power distribution requirements.
Whatsapp: +86-13961294414
E-mail: junqiu.wang@czguanghui.cn
jocelyn.duan@czguanghui.cn
ADD: No. 1, Yulong Middle Road, Xuejia Town, Xinbei District, Changzhou City, China
Mobile: 0086-15380068868
